利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

14 条记录 (耗时 0.013 秒)

    Calibration of tape drive velocity employing DC motor hall sensor
    1.
    发明授权
    Calibration of tape drive velocity employing DC motor hall sensor 失效
    使用直流电机霍尔传感器校准磁带机速度

    公开(公告)号：US06836386B2

    公开(公告)日：2004-12-28

    申请号：US10241510

    申请日：2002-09-12

    申请人： John Alexander Koski

    发明人： John Alexander Koski

    IPC分类号： G11B1552

    CPC分类号： G11B15/54

    摘要： Calibration logic separately operates DC motors of a tape drive at a steady state estimated velocity (Omega C) for at least one full revolution without a tape; senses Hall sensor(s) to indicate a full revolution of each motor, measuring the time of the full revolution; determines the actual velocity (Omega A) of each motor employing the measured time; compares Omega C to Omega A to determine a calibration constant (K calib) for each motor; to calibrate the motor velocity of each motor, for determining the velocity for a mounted tape by averaging the tape velocity generated by each motor based on the calibrated motor velocity.

    摘要翻译： 校准逻辑以固定的估计速度（Ω-C）将带驱动器的直流电动机分别运行至少一整圈而无需磁带; 感测霍尔传感器以指示每个电机的全转，测量完全旋转的时间; 使用测量时间确定每台电机的实际速度（Ω-A） 将Omega C与Omega A进行比较，以确定每台电机的校准常数（K calib）; 以校准每个电机的电机速度，以通过基于校准的电动机速度平均由每个电动机产生的磁带速度来确定安装的磁带的速度。

    Optical servo control circuits and methods using pulse width modulation and offset control for driving an electromechanical motor
    2.
    发明授权
    Optical servo control circuits and methods using pulse width modulation and offset control for driving an electromechanical motor 有权
    光伺服控制电路及使用脉宽调制和偏移控制的机电电机驱动方法

    公开(公告)号：US06552979B1

    公开(公告)日：2003-04-22

    申请号：US09702174

    申请日：2000-10-30

    申请人： Wesley Ladd Mokry ,  Rex Thomas Baird

    发明人： Wesley Ladd Mokry ,  Rex Thomas Baird

    IPC分类号： G11B1552

    CPC分类号： G11B15/52

    摘要： Servo control circuitry 300 includes a digital to analog converter 402 for converting digital servo control data into a pulse width modulated signal. A first conductor transmits the pulse width modulated signal to an external device 409. A second conductor transmits a reference signal derived from the clock signal to external device 409, external device 409 differentially receiving the pulse width modulated signal with respect to the reference signal.

    摘要翻译： 伺服控制电路300包括用于将数字伺服控制数据转换成脉冲宽度调制信号的数模转换器402。 第一导体将脉宽调制信号发送到外部设备409.第二导体将从时钟信号导出的参考信号传输到外部设备409，外部设备409相对于参考信号差分地接收脉宽调制信号。

    Data recording and reproducing method for multi-layered optical disk system
    3.
    发明授权
    Data recording and reproducing method for multi-layered optical disk system 有权
    多层光盘系统的数据记录和再现方法

    公开(公告)号：US06426927B2

    公开(公告)日：2002-07-30

    申请号：US09832080

    申请日：2001-04-10

    申请人： Yasuo Kamatani

    发明人： Yasuo Kamatani

    IPC分类号： G11B1552

    CPC分类号： G11B7/00736 ,  G11B7/0037 ,  G11B7/0045 ,  G11B7/005 ,  G11B19/12 ,  G11B20/00007 ,  G11B27/105 ,  G11B27/11 ,  G11B27/329 ,  G11B2007/0013 ,  G11B2020/10537 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/235 ,  G11B2220/2562 ,  G11B2220/65 ,  H04N5/85 ,  H04N9/7921 ,  H04N9/8042

    摘要： A data recording and reproducing method for an optical disk data storage system to record data compressed at different data compression rate according to an operator's specification, and to reproduce the recorded data by decompressing. According to the operator's indication, the data is recorded at certain data compression rate in indicated area. The information of the data compression rate and the recorded area is stored as a table of contents (TOC) data. The TOC data is reproduced and stored in a memory after the optical disk is loaded. The recorded data is reproduced by selecting a decoding circuit to decompress the data. The decoding circuit is selected by referring the TOC data to identify data compression rate of the recorded data. Also the TOC data is referred to identify read-in and read-out region of the recorded data. The position of a pick-up when the data recording is started and ended, is recorded as the TOC data to provide random access capability for the data reproduction.

    摘要翻译： 一种用于光盘数据存储系统的数据记录和再现方法，用于根据操作人员的说明记录以不同数据压缩率压缩的数据，并通过解压缩再现记录数据。 根据操作人员的指示，在指定区域以某些数据压缩率记录数据。 数据压缩率和记录区域的信息被存储为内容表（TOC）数据。 在加载光盘之后，TOC数据被再现并存储在存储器中。 通过选择解压缩数据的解码电路来再现所记录的数据。 通过参考TOC数据来选择解码电路以识别记录数据的数据压缩率。 此外，TOC数据也被称为识别记录数据的读入区和读出区。 当数据记录开始和结束时，拾取器的位置被记录为TOC数据，以提供用于数据再现的随机存取能力。

    Information recording apparatus and method
    5.
    发明授权
    Information recording apparatus and method 有权
    信息记录装置及方法

    公开(公告)号：US06212141B1

    公开(公告)日：2001-04-03

    申请号：US09251740

    申请日：1999-02-18

    申请人： Toshiro Tanikawa

    发明人： Toshiro Tanikawa

    IPC分类号： G11B1552

    CPC分类号： G11B20/1217 ,  G11B27/329 ,  G11B2220/216 ,  G11B2220/2562

    摘要： An information recording apparatus initializes an information record medium of repeatedly recordable type, on which at least a lead in area and a data area following the lead in area are assigned in accordance with a predetermined format, and records record information onto the initialized information record medium, and further records the record information onto the initialized and recorded information record medium. The record information comprises data information in the data area as main portion of the record information to be recorded and control information in the lead in area for controlling recording and reproducing operation of the data information. The control information includes a last recorded address indicating an address in the data area of a last portion of the data information which is previously recorded by the recording operation. The information recording apparatus is provided with a controlling device for controlling a writing device to write a predetermined address smaller than a head address of the data area as the last recorded address into the lead in area as one portion of the control information when initializing the information record medium.

    摘要翻译： 信息记录装置初始化可重复记录类型的信息记录介质，根据预定格式分配至少领先区域和跟随引导区域的数据区域，并将记录信息记录在初始化信息记录介质上 并且将记录信息进一步记录到初始化和记录的信息记录介质上。 记录信息包括作为要记录的记录信息的主要部分的数据区域中的数据信息和用于控制数据信息的记录和再现操作的引导区域中的控制信息。 控制信息包括最后记录的地址，指示通过记录操作预先记录的数据信息的最后部分的数据区中的地址。 信息记录装置设置有控制装置，用于控制写入装置，将初始化信息的一部分作为控制信息的一部分，将比作为最后记录地址的数据区的头地址小的预定地址写入引导区 记录媒体。

    Velocity feedback measurement method
    6.
    发明授权
    Velocity feedback measurement method 失效
    速度反馈测量方法

    公开(公告)号：US06470291B1

    公开(公告)日：2002-10-22

    申请号：US09404604

    申请日：1999-09-24

    申请人： Turguy Goker ,  Edward H. Patrick ,  Stanley S. Tang

    发明人： Turguy Goker ,  Edward H. Patrick ,  Stanley S. Tang

    IPC分类号： G11B1552

    CPC分类号： G11B15/54

    摘要： To provide accurate measurement of rotational velocity and an adequate bandwidth for servo control as a function of the measurement over a wide range of velocities, the present invention utilizes unique speed computation algorithms based on a combination of fine and coarse shaft velocity measurements from a tachometer. The preferred embodiments utilize control signals derived from the velocity measurements to control motor speed, for example, to provide servo control of a digital tape drive. The preferred embodiments utilize an optical encoder coupled to a reel-shaft to generate tachometer pulses as the shaft rotates. The coarse measurement may actually take two different forms for different speed ranges. In one range, this measurement involves counting the number of pulses in a sampling interval. In the other range, the coarse measurement entails counting the number of sampling intervals per detection of a tachometer pulse. The fine velocity measurement is based on detection of differences in time delays between certain ones of the tachometer pulses and the edges of one or more of the sampling intervals. The delay detections may entail counting pulses of a clock signal, which has a rate substantially higher than the sampling rate, for periods between certain tachometer pulses and the edges of one or more of the sample intervals. The fine measurements provide a correction in the speed calculation for variations in phase relationship between the sampling and the tachometer pulses.

    摘要翻译： 为了提供作为在宽范围速度上的测量的函数的伺服控制的旋转速度的准确测量和足够的带宽，本发明基于来自转速计的精细和粗略轴速度测量的组合来利用独特的速度计算算法。 优选实施例利用从速度测量得到的控制信号来控制电机速度，例如提供数字磁带驱动器的伺服控制。 优选实施例利用耦合到卷轴的光学编码器来随着轴旋转而产生转速计脉冲。 对于不同的速度范围，粗略测量实际上可能采取两种不同的形式。 在一个范围内，该测量涉及对采样间隔内的脉冲数进行计数。 在另一个范围内，粗略测量需要对每个检测到转速计脉冲的采样间隔数进行计数。 精细速度测量是基于检测到某些转速计脉冲之间的时间延迟与一个或多个采样间隔的边沿之间的差异的检测。 对于在某些转速计脉冲与一个或多个采样间隔的边沿之间的周期，延迟检测可能需要对具有明显高于采样速率的速率的时钟信号的计数脉冲。 精细测量提供了在采样和转速计脉冲之间的相位关系变化的速度计算中的校正。

    Control system of tape travel for a magnetic recording and reproducing apparatus
    7.
    发明授权
    Control system of tape travel for a magnetic recording and reproducing apparatus 失效
    用于磁记录和再现装置的磁带行进控制系统

    公开(公告)号：US06424483B1

    公开(公告)日：2002-07-23

    申请号：US08751480

    申请日：1996-11-18

    申请人： Kenichi Honjo ,  Haruo Isaka ,  Satoshi Ohyama ,  Masafumi Nishida ,  Yoshio Sakakibara ,  Toshiyuki Kohri ,  Koji Sakurai

    发明人： Kenichi Honjo ,  Haruo Isaka ,  Satoshi Ohyama ,  Masafumi Nishida ,  Yoshio Sakakibara ,  Toshiyuki Kohri ,  Koji Sakurai

    IPC分类号： G11B1552

    CPC分类号： G11B15/125 ,  G11B5/5927 ,  G11B15/087 ,  G11B15/1808 ,  G11B15/1875 ,  G11B15/20 ,  G11B15/4675 ,  G11B15/4678 ,  G11B15/48 ,  G11B15/52 ,  G11B15/54 ,  G11B27/032 ,  G11B27/13 ,  G11B27/322 ,  G11B2220/90

    摘要： A magnetic recording and reproducing device according to the present invention operates with steps of moving a magnetic tape having a plurality of tracks per frame and a plurality of control signals recorded thereon, keeping count of the pulses of a frequency generator signal corresponding to the rotation of a capstan motor by a frequency generator counter, resetting the count of the frequency generator pulses by the control signal reproduced by a fixed magnetic head, detecting the track number by the control signal counter reset by a frame reference signal, controlling, at the start, the start timing on the basis of the tape stop position detected by the frequency generator pulse counter and control counter and the reference frame signal from the reference frame signal generator. The device prevents thinning of tracks at the editing point in after-break recording and the disturbance of images immediately after the start. The device does not require a special circuit or complicated software-wise processing, and provides a stabilized slow-reproduced image. Further, in a magnetic recording and reproducing device for intermittent recording, there is no danger of causing thinning to recorded tracks. Thus, a reproduced image of high quality can be obtained.

    摘要翻译： 根据本发明的磁记录和再现装置的操作步骤是移动每帧具有多个磁道的磁带和记录在其上的多个控制信号，保持对应于频率发生器信号的旋转的脉冲数 通过频率发生器计数器的主导轴电动机，通过由固定磁头再现的控制信号来复位频率发生器脉冲的计数，通过由帧参考信号重新设置的控制信号计数器检测磁道号， 基于由频率发生器脉冲计数器和控制计数器检测的磁带停止位置的起始定时和来自参考帧信号发生器的参考帧信号。 该设备防止在断点录制时的编辑点的轨道变薄，以及开始后立即对图像的干扰。 该设备不需要特殊电路或复杂的软件处理，并提供稳定的慢再现图像。 此外，在用于间歇记录的磁记录和再现装置中，不存在导致记录轨迹变薄的危险。 因此，可以获得高质量的再现图像。

    Optical storage apparatus
    9.
    发明授权
    Optical storage apparatus 失效

    公开(公告)号：US06526014B2

    公开(公告)日：2003-02-25

    申请号：US09898930

    申请日：2001-07-02

    申请人： Takashi Masaki ,  Shigenori Yanagi

    发明人： Takashi Masaki ,  Shigenori Yanagi

    IPC分类号： G11B1552

    CPC分类号： G11B7/126 ,  G11B11/10595

    摘要： A division test write processing unit is provided and a test writing process for deciding an optimum light emitting power by executing a test writing on a medium is divided into a plurality of division test writing processes. When an upper command is received, in the division test write processing unit, a division control unit skips to a division executing unit locating at the head of the processes which are not yet executed among a plurality of division executing units and allows the dividing processes of the test writing to be executed for a predetermined time.